#region License
// Copyright (c) Jeremy Skinner (http://www.jeremyskinner.co.uk)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// The latest version of this file can be found at https://github.com/jeremyskinner/FluentValidation
#endregion

namespace ServiceStack.FluentValidation.Validators
{
	using System;
	using Internal;

	public class PropertyValidatorContext
    {
		private MessageFormatter messageFormatter;
		private readonly Lazy<object> propertyValueContainer;

		public ValidationContext ParentContext { get; private set; }
		public PropertyRule Rule { get; private set; }
		public string PropertyName { get; private set; }

		public string PropertyDescription
        {
			get { return Rule.GetDisplayName(); }
		}

		public object Instance
        {
			get { return ParentContext.InstanceToValidate; }
		}

		public MessageFormatter MessageFormatter
		{
			get { return messageFormatter ?? (messageFormatter = new MessageFormatter()); }
		}

		//Lazily load the property value
		//to allow the delegating validator to cancel validation before value is obtained
		public object PropertyValue
        {
			get { return propertyValueContainer.Value; }
		}

		public PropertyValidatorContext(ValidationContext parentContext, PropertyRule rule, string propertyName)
        {
			ParentContext = parentContext;
			Rule = rule;
			PropertyName = propertyName;
			propertyValueContainer = new Lazy<object>( () => rule.PropertyFunc(parentContext.InstanceToValidate));
		}


        public PropertyValidatorContext(ValidationContext parentContext, PropertyRule rule, string propertyName, object propertyValue)
		{
			ParentContext = parentContext;
			Rule = rule;
			PropertyName = propertyName;
			propertyValueContainer = new Lazy<object>(() => propertyValue);
		}
	}
}